DE19910871B4 - Process and installation for the separation of air by cryogenic distillation - Google Patents
Process and installation for the separation of air by cryogenic distillation Download PDFInfo
- Publication number
- DE19910871B4 DE19910871B4 DE19910871A DE19910871A DE19910871B4 DE 19910871 B4 DE19910871 B4 DE 19910871B4 DE 19910871 A DE19910871 A DE 19910871A DE 19910871 A DE19910871 A DE 19910871A DE 19910871 B4 DE19910871 B4 DE 19910871B4
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- Germany
- Prior art keywords
- air
- column
- exchange line
- stream
- double
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- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
- F25J3/04387—Details relating to the work expansion, e.g. process parameter etc. using liquid or hydraulic turbine expansion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
- F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
- F25J2240/10—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/12—Particular process parameters like pressure, temperature, ratios
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Verfahren
zur Zerlegung von Luft durch kryogene Destillation in einer Anlage
mit einer Doppelsäule
(2), umfassend folgende Schritte:
a) zumindest zwei Luftströme (6, 7,
7A) werden in einer Austauschleitung (1) gekühlt und einer ersten Säule (3)
der Doppelsäule
zugeführt;
b)
in der ersten Säule
(3) wird die Luft in eine sauerstoffreiche Fraktion und eine stickstoffreiche
Fraktion zerlegt;
c) aus einer zweiten Säule (4) der Doppelsäule wird
ein flüssiger
Strom (16) abgezogen und in der Austauschleitung (1) verdampft;
d)
in der Austauschleitung (1) steht ein erster (6) der zumindest zwei
Luftströme
(6, 7, 7A) im Wärmeaustausch
mit dem verdampfenden Flüssigkeitsstrom;
e)
auf einem Zwischenniveau der Austauschleitung (1) wird der zweite
Luftstrom (7, 7A) der zumindest zwei Luftströme (6, 7, 7A) abgezogen;
f)
der zweite Luftstrom (7, 7A) wird ohne Entspannung aus der Austauschleitung
(1) zu der Doppelsäule
(2) geleitet,
dadurch gekennzeichnet, dass ein dritter...Process for the separation of air by cryogenic distillation in a double-column plant (2), comprising the following steps:
a) at least two air streams (6, 7, 7A) are cooled in an exchange line (1) and fed to a first column (3) of the double column;
b) in the first column (3), the air is decomposed into an oxygen-rich fraction and a nitrogen-rich fraction;
c) from a second column (4) of the double column, a liquid stream (16) is withdrawn and evaporated in the exchange line (1);
d) in the exchange line (1) is a first (6) of the at least two air streams (6, 7, 7A) in heat exchange with the evaporating liquid stream;
e) at an intermediate level of the exchange line (1), the second air stream (7, 7A) of the at least two air streams (6, 7, 7A) is withdrawn;
f) the second air stream (7, 7A) is passed without relaxation from the exchange line (1) to the double column (2),
characterized in that a third ...
Description
Die Erfindung betrifft ein Verfahren zur Zerlegung von Luft durch kryogene Destillation nach dem Oberbegriff des Anspruchs 1 und eine Anlage zur des Zerlegung von Luft durch deren Destillation nach dem Oberbegriff des Anspruchs 3.The The invention relates to a process for the separation of air by cryogenic Distillation according to the preamble of claim 1 and an attachment for the decomposition of air by their distillation according to the generic term of claim 3.
Um ein Gas aus verdichteter Luft zu gewinnen, wird bekanntlich eine Flüssigkeit aus einer Luftdestillationssäule abgezogen, verdichtet und in einer Hauptwärmeaustauschleitung der betreffenden Anlage verdampft. Das Gas kann auf diese Weise unter einem höheren als dem in der Säule herrschenden Druck gewonnen werden.Around It is well known to extract a gas from compressed air liquid from an air distillation column withdrawn, compressed and in a main heat exchange line of the relevant Plant evaporates. The gas can be in this way under a higher than in the column prevailing pressure to be won.
Aus
der
Aus
der
Aus
der
Diese Bedingung der Temperaturgleichheit verhindert häufig ein optimales Arbeiten der Mitteldrucksäule.These Condition of temperature equality often prevents optimal work the medium pressure column.
Der verflüssigte, unter einem höheren Druck stehende Strom, wird entspannt und unterliegt beim Eintritt in die Mitteldrucksäule einem Flash-Schritt. Der unter einem niedrigeren Druck stehende Strom, der am kalten Ende der Austauschleitung austritt, enthält bisweilen eine flüssige Fraktion. Daher arbeitet der untere Bereich der Mitteldrucksäule nicht optimal, und zwar wegen einer zu kalten Sumpfbeschickung und/oder einer zu warmen Kopfbeschickung.Of the liquefied under a higher Pressure current, is relaxed and subject to entry in the medium-pressure column a flash step. The one under a lower pressure Current exiting at the cold end of the replacement line sometimes contains a liquid Fraction. Therefore, the lower portion of the medium pressure column does not work optimal, because of a too cold bottoms feed and / or too hot a head load.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Anlage zu schaffen, bei dem die die Säulen speisenden Luftströme in Bezug auf die Temperaturen einen zusätzlichen Freiheitsgrad haben, so dass der optimale Betrieb der Säulen gewährleistet ist.Of the Invention is based on the object, a method and a system to create, where the pillars feeding air streams have an extra degree of freedom in terms of temperatures, so that the optimal operation of the columns is guaranteed.
Diese Aufgabe ist durch ein Verfahren zur Zerlegung von Luft durch kryogene Destillation nach dem Anspruch 1 bzw. eine Anlage nach dem Anspruch 3 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen genannt. These Task is by a method for the decomposition of air by cryogenic Distillation according to claim 1 or a plant according to the claim 3 solved. Advantageous embodiments of the invention are mentioned in the subclaims.
Das Verfahren umfasst folgende Schritte:
- a) Zumindest zwei Luftströme werden in einer Wärmeaustauschleitung gekühlt und einem Säulensystem zugeführt;
- b) die Luft wird in einer Säule des Systems in eine sauerstoffreiche und eine stickstoffreiche Fraktion zerlegt;
- c) ein flüssiger Strom wird aus einer Säule des Systems abgezogen und in der Wärmeaustauschleitung verdampft;
- d) ein erster Luftstrom steht in der Wärmeaustauschleitung im Wärmeaustausch mit der verdampfenden Flüssigkeit;
- e) ein zweiter Luftstrom wird auf einem Zwischenniveau der Austauschleitung abgezogen und ohne Entspannung einer Säule des Systems zugeführt;
- f) ein dritter Luftstrom wird auf einem Zwischenniveau der Austauschleitung, stromab des Niveaus, auf dem der zweite Luftstrom abgezogen wird, abgezogen, und
- g) der dritte Luftstrom wird ggfs. ohne Entspannung aus der Austauschleitung dem Säulensystem zugeführt.
- a) At least two air streams are cooled in a heat exchange line and fed to a column system;
- b) the air is decomposed in one column of the system into an oxygen-rich and a nitrogen-rich fraction;
- c) a liquid stream is withdrawn from a column of the system and evaporated in the heat exchange line;
- d) a first air stream is in the heat exchange line in heat exchange with the evaporating liquid;
- e) a second air stream is withdrawn at an intermediate level of the exchange line and fed without relaxation to a column of the system;
- f) a third air stream is withdrawn at an intermediate level of the exchange line, downstream of the level at which the second air stream is withdrawn, and
- g) the third air flow is optionally supplied to the column system without relaxation from the exchange line.
Bevorzugte Ausführungsformen des Verfahrens nach der Erfindung können mindestens eines der folgenden Merkmale aufweisen:
- – mindestens ein Teil des ersten Stroms wird verflüssigt und einer Säule der Anlage zugeführt;
- – zumindest ein Teil des ersten verflüssigten Stroms wird in einer Turbine entspannt.
- - At least a portion of the first stream is liquefied and fed to a column of the system;
- - At least a portion of the first liquefied stream is expanded in a turbine.
Des Weiteren hat die Erfindung eine Anlage zur Zerlegung von Luft durch Destillation zum Gegenstand, umfassend:
- – ein Säulensystem
- – Mittel, um einen ersten und einen zweiten Luftstrom zu einer Austauschleitung und von der Austauschleitung zu dem Säulensystem zu leiten;
- – Mittel, um mindestens eine verdichtete, aus dem Säulensystem stammende Flüssigkeit der Austauschleitung zuzuführen,
- – Mittel, um den zweiten Luftstrom auf einem Zwischenniveau der Austauschleitung abzuziehen;
- – Mittel, um den zweiten Luftstrom von dem Zwischenniveau der Austauschleitung zu der Mitteldrucksäule zu leiten, wobei diese Mittel keine Mittel zur Entspannung des Stroms umfassen;
- – Leitungen für einen dritten Luftstrom, der in der Aus tauschleitung abkühlt, und Mittel zum Abziehen des dritten Stroms stromab der Stellen an der der zweite Strom abgezogen wird;
- – Mittel, um den dritten Strom zu einer Mitteldrucksäule zu leiten, wobei diese Mittel keine Entspannungsmittel umfassen.
- - a column system
- - Means for directing a first and a second air flow to a replacement line and from the exchange line to the column system;
- Means for supplying at least one compressed liquid originating from the column system to the exchange line,
- - Means for subtracting the second air flow at an intermediate level of the exchange line;
- - Means to the second air flow from the intermediate level of the exchange line to the means to direct pressure column, these means do not comprise means for relaxing the flow;
- - lines for a third air stream which cools in the off exchange line, and means for withdrawing the third stream downstream of the points at which the second stream is withdrawn;
- Means for directing the third stream to a medium-pressure column, these means not comprising any depressants.
Bevorzugte Ausführungsformen der Anlage nach der Erfindung können eine Argonsäule, die mit einem aus der Niederdrucksäule stammenden Strom gespeist wird, aufweisen.preferred embodiments the plant according to the invention can an argon column, fed with a current from the low pressure column is, have.
Die Zeichnung zeigt schematisch vereinfacht:The Drawing shows schematically simplified:
Die
in
Die
Anlage umfasst im Wesentliche eine (Wärme)-Austauschleitung
Ein
erster Luftstrom
Ein
zweiter Luftstrom
Ein
weiterer Strom
Arme
und reiche Flüssigkeit
werden aus der Mitteldrucksäule
Flüssiger Sauerstoff,
von dem ein Teil zur Flüssigkeitsgewinnung
genutzt wird, wird aus dem Sumpf der Niederdrucksäule
Wie
Bei
der Ausführungsform
nach
Diese
Ausführungsform
kann, wie auch die nach
Wenn
die Blasturbine
Die verdichtete, in der Austauschleitung verdampfte Flüssigkeit kann Flüssigstickstoff oder Flüssigargon sein.The compressed, evaporated in the exchange line liquid can be liquid nitrogen or liquid argon be.
In der Austauschleitung können mehrere Flüssigkeiten gleichzeitig verdampfen.In the exchange line can several liquids evaporate at the same time.
Wenn
der Luftstrom
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9802977 | 1998-03-11 | ||
FR9802977A FR2776057B1 (en) | 1998-03-11 | 1998-03-11 | METHOD AND PLANT FOR AIR SEPARATION BY CRYOGENIC DISTILLATION |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19910871A1 DE19910871A1 (en) | 1999-09-16 |
DE19910871B4 true DE19910871B4 (en) | 2007-10-25 |
Family
ID=9523909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19910871A Expired - Fee Related DE19910871B4 (en) | 1998-03-11 | 1999-03-11 | Process and installation for the separation of air by cryogenic distillation |
Country Status (5)
Country | Link |
---|---|
US (1) | US6141990A (en) |
JP (1) | JPH11294946A (en) |
DE (1) | DE19910871B4 (en) |
FR (1) | FR2776057B1 (en) |
GB (1) | GB2335263B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10155383A1 (en) * | 2001-11-10 | 2003-05-28 | Messer Ags Gmbh | Method and device for the low-temperature separation of air |
FR2854683B1 (en) * | 2003-05-05 | 2006-09-29 | Air Liquide | METHOD AND INSTALLATION FOR PRODUCING PRESSURIZED AIR GASES BY AIR CRYOGENIC DISTILLATION |
US7533540B2 (en) * | 2006-03-10 | 2009-05-19 | Praxair Technology, Inc. | Cryogenic air separation system for enhanced liquid production |
US20080223077A1 (en) * | 2007-03-13 | 2008-09-18 | Neil Mark Prosser | Air separation method |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260056A (en) * | 1962-01-12 | 1966-07-12 | Linde Ag | Regenerative heat exchange in low temperature gas fractionation |
EP0093448A2 (en) * | 1982-05-03 | 1983-11-09 | Linde Aktiengesellschaft | Process and apparatus for obtaining gaseous oxygen at elevated pressure |
DE3307181A1 (en) * | 1983-03-01 | 1984-09-06 | Linde Ag, 6200 Wiesbaden | Process and apparatus for the separation of air |
EP0153673A2 (en) * | 1984-02-21 | 1985-09-04 | Air Products And Chemicals, Inc. | Dual feed air pressure nitrogen generator cycle |
FR2674011A1 (en) * | 1991-03-11 | 1992-09-18 | Grenier Maurice | Method and installation for producing gaseous oxygen under pressure |
US5291737A (en) * | 1991-08-07 | 1994-03-08 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process or apparatus for distilling air and application in feeding gas to a steel mill |
US5355682A (en) * | 1993-09-15 | 1994-10-18 | Air Products And Chemicals, Inc. | Cryogenic air separation process producing elevated pressure nitrogen by pumped liquid nitrogen |
FR2711778A1 (en) * | 1993-10-26 | 1995-05-05 | Air Liquide | Method and installation for producing oxygen and/or nitrogen under pressure |
US5511381A (en) * | 1994-03-16 | 1996-04-30 | The Boc Group Plc | Air separation |
EP0745817A1 (en) * | 1995-06-01 | 1996-12-04 | Daido Hoxan Inc. | oxygen gas manufacturing apparatus |
US5704229A (en) * | 1996-12-18 | 1998-01-06 | The Boc Group, Inc. | Process and apparatus for producing nitrogen |
EP0816785A2 (en) * | 1996-06-27 | 1998-01-07 | Praxair Technology, Inc. | Cryogenic rectification system for producing low purity oxygen and high purity nitrogen |
-
1998
- 1998-03-11 FR FR9802977A patent/FR2776057B1/en not_active Expired - Fee Related
-
1999
- 1999-03-10 US US09/265,833 patent/US6141990A/en not_active Expired - Lifetime
- 1999-03-10 JP JP11063149A patent/JPH11294946A/en active Pending
- 1999-03-11 GB GB9905615A patent/GB2335263B/en not_active Expired - Fee Related
- 1999-03-11 DE DE19910871A patent/DE19910871B4/en not_active Expired - Fee Related
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260056A (en) * | 1962-01-12 | 1966-07-12 | Linde Ag | Regenerative heat exchange in low temperature gas fractionation |
EP0093448A2 (en) * | 1982-05-03 | 1983-11-09 | Linde Aktiengesellschaft | Process and apparatus for obtaining gaseous oxygen at elevated pressure |
DE3307181A1 (en) * | 1983-03-01 | 1984-09-06 | Linde Ag, 6200 Wiesbaden | Process and apparatus for the separation of air |
EP0153673A2 (en) * | 1984-02-21 | 1985-09-04 | Air Products And Chemicals, Inc. | Dual feed air pressure nitrogen generator cycle |
FR2674011A1 (en) * | 1991-03-11 | 1992-09-18 | Grenier Maurice | Method and installation for producing gaseous oxygen under pressure |
US5291737A (en) * | 1991-08-07 | 1994-03-08 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process or apparatus for distilling air and application in feeding gas to a steel mill |
US5355682A (en) * | 1993-09-15 | 1994-10-18 | Air Products And Chemicals, Inc. | Cryogenic air separation process producing elevated pressure nitrogen by pumped liquid nitrogen |
FR2711778A1 (en) * | 1993-10-26 | 1995-05-05 | Air Liquide | Method and installation for producing oxygen and/or nitrogen under pressure |
US5511381A (en) * | 1994-03-16 | 1996-04-30 | The Boc Group Plc | Air separation |
EP0745817A1 (en) * | 1995-06-01 | 1996-12-04 | Daido Hoxan Inc. | oxygen gas manufacturing apparatus |
EP0816785A2 (en) * | 1996-06-27 | 1998-01-07 | Praxair Technology, Inc. | Cryogenic rectification system for producing low purity oxygen and high purity nitrogen |
US5704229A (en) * | 1996-12-18 | 1998-01-06 | The Boc Group, Inc. | Process and apparatus for producing nitrogen |
Also Published As
Publication number | Publication date |
---|---|
FR2776057A1 (en) | 1999-09-17 |
GB2335263B (en) | 2002-05-08 |
JPH11294946A (en) | 1999-10-29 |
DE19910871A1 (en) | 1999-09-16 |
GB2335263A (en) | 1999-09-15 |
FR2776057B1 (en) | 2000-06-23 |
GB9905615D0 (en) | 1999-05-05 |
US6141990A (en) | 2000-11-07 |
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